Calling Shias kaafirs
Q: I belong to a community who believes that majority of Shia are kaafir and want me to call them kaafir too. When I say that I leave this to Allah to decide as I am no one to judge then they call my aqeedah distorted and some even go further by saying that I am an Athiest.
Is it mandatory to call others kaafirs or what does Islam say for people who don’t want to give their verdict?